/*
� 最佳准确率窗口:
{
  windowSize: 6,
  total: 1244,
  correct: 813,
  accuracy: 65.35,
  maxWrongStreak: 6
}

� 最小连续错误窗口:
{
  windowSize: 18,
  total: 1244,
  correct: 806,
  accuracy: 64.79,
  maxWrongStreak: 5
}
*/
// 📦 引入工具库
const _ = require("lodash");
const path = require("path");
const fs = require("fs");

// 📦 ESM 支持模块加载
const esm = require("esm");
const requireModule = esm(module);

// 📦 项目依赖模块
const { readAllValues } = requireModule(
  "../../../awakened-potential/helpers/readAllValues.js"
);
const checkAccuracy = requireModule("../../utils/checkAccuracy.js");

// ✅ 读取历史开奖数据（模拟全部）
const allValues = readAllValues("m");

// ✅ 号码池（01 ~ 49）
const allNumbers = Array.from({ length: 49 }, (_, i) =>
  (i + 1).toString().padStart(2, "0")
);

/**
 * ✨ 冷却回归策略
 * - 找出在当前窗口内“最久未出现”的号码
 * - 优先选择这些号码作为候选
 */
const select32ByCoolingReturn = (temp) => {
  const lastSeenMap = {};
  const currentIndex = temp.length;

  allNumbers.forEach((n) => (lastSeenMap[n] = currentIndex));

  for (let i = temp.length - 1; i >= 0; i--) {
    const num = temp[i].number;
    if (lastSeenMap[num] === currentIndex) {
      lastSeenMap[num] = currentIndex - i;
    }
  }

  const sorted = Object.entries(lastSeenMap)
    .sort((a, b) => b[1] - a[1] || a[0].localeCompare(b[0]))
    .map(([num]) => num)
    .slice(0, 32);

  if (sorted.length !== 32) {
    throw new Error(`❗ 无法生成 32 个不重复号码（目前只有 ${sorted.length} 个）`);
  }

  return sorted;
};

// ✅ 多窗口测试结果
const testResults = [];

for (let windowSize = 2; windowSize <= 200; windowSize++) {
  const useWindow = true;
  const predictResults = [];
  let correct = 0;
  let maxWrongStreak = 0;
  let currentWrongStreak = 0;

  allValues.forEach((item, index) => {
    const temp = useWindow
      ? allValues.slice(Math.max(0, index - windowSize), index)
      : allValues.slice(0, index);

    if (temp.length === 0) return;

    const selectedNumbers = select32ByCoolingReturn(temp);

    if (selectedNumbers.length !== 32) {
      throw new Error("选出的32个号码数量不正确");
    }

    try {
      const isHit = checkAccuracy(selectedNumbers, item.number);
      if (isHit) {
        correct++;
        currentWrongStreak = 0;
      } else {
        currentWrongStreak++;
        maxWrongStreak = Math.max(maxWrongStreak, currentWrongStreak);
      }
      predictResults.push(selectedNumbers);
    } catch (err) {
      console.error(`❌ checkAccuracy error at index ${index}: ${err.message}`);
    }
  });

  const total = predictResults.length;
  const accuracy = total > 0 ? ((correct / total) * 100).toFixed(2) : 0;

  testResults.push({
    windowSize,
    total,
    correct,
    accuracy: Number(accuracy),
    maxWrongStreak,
  });
}

// ✅ 输出所有窗口测试结果
testResults.forEach((res) => {
  console.log(
    `windowSize = ${res.windowSize}, 准确率 = ${res.accuracy}%, 最大连续错误次数 = ${res.maxWrongStreak}`
  );
});

// ✅ 输出最佳结果
const bestAcc = _.maxBy(testResults, "accuracy");
const bestStable = _.minBy(testResults, "maxWrongStreak");

console.log("\n🎯 最佳准确率窗口:");
console.log(bestAcc);
console.log("\n🧱 最小连续错误窗口:");
console.log(bestStable);
